MPLS. Cisco MPLS. Cisco Router Challenge 227. MPLS Introduction. The most up-to-date version of this test is at:

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1 MPLS Cisco MPLS MPLS Introduction The most up-to-date version of this test is at: Cisco Router Challenge 227 Outline This challenge involves basic frame-mode MPLS configuration. Objectives The objectives of this challenge are to: Enable CEF globally. Enable CEF on S0. Define IGP routing protocol. Assign LDP router ID. Enable IPv4 MPLS on an interface (mpls ip). Commands (config-if)# ip route-cache cef (config-if)# mpls ip (config)# router ospf 101 (config-router)# network area 1 (config)# mpls ldp router-id loopback5 NetworkSims.com Prof W.Buchanan 1

2 Example (config-if)# ip route-? cef Enable Cisco Express Forwarding flow Enable Flow fast-switching cache policy Enable fast-switching policy cache for outgoing packets same-interface Enable fast-switching on the same interface <cr> (config-if)# ip route-cache cef (config-if)# mpls? accounting Enable MPLS accounting on this interface ip Configure dynamic MPLS forwarding for IP label Label properties ldp Configure Label Distribution Protocol (LDP) parameters mtu Set tag switching Maximum Transmission Unit netflow Configure Egress Netflow Accounting traffic-eng Configure Traffic Engineering parameters (config-if)# mpls ip (config)# router ospf 101 (config-router)# network area 1 (config-router)# exit (config)# mpls? atm Configure ATM options ip Dynamic MPLS forwarding for IP ipv6 Dynamic MPLS forwarding for IPv6 label Label properties ldp Label Distribution Protocol static Configure static label bindings traffic-eng Configure Traffic Engineering parameters (config)# mpls ldp? advertise-labels Label advertisements atm Configure ATM MPLS options backoff Set LDP session backoff parameters discovery LDP discovery explicit-null Advertise Explicit Null label in place of Implicit Null graceful-restart Configure LDP Graceful Restart holdtime LDP session holdtime igp Configure IGP-related LDP parameters logging Enable LDP logging loop-detection Enable LDP Loop Detection maxhops Limit hop count for LDP LSP setup neighbor Configure neighbor parameters path-vector Path Vector for LDP LSP setup request-labels Access list to specify valid downstream on demand destinations. router-id Select interface to prefer for LDP identifier address session Configure session parameters tcp Set TCP parameters for LDP (config)# mpls ldp router-id? Async Async interface BVI Bridge-Group Virtual Interface CDMA-Ix CDMA Ix interface NetworkSims.com Prof W.Buchanan 2

3 CTunnel CTunnel interface Dialer Dialer interface Ethernet IEEE FastEthernet FastEthernet IEEE Group-Async Async Group interface Lex Lex interface Loopback Loopback interface MFR Multilink Frame Relay bundle interface Multilink Multilink-group interface Null Null interface Port-channel Ethernet Channel of interfaces Serial Serial TokenRing IEEE Tunnel Tunnel interface Vif PGM Multicast Host interface Virtual-PPP Virtual PPP interface Virtual-Template Virtual Template interface Virtual-TokenRing Virtual TokenRing (config)# mpls ldp router-id loopback5 Cisco Router Challenge 228 Outline This challenge involves configuration of MPLS over a routed PVC in ATM. Objectives The objectives of this challenge are to: Enable CEF globally. Enable MPLS on ATM. Define ATM interface parameters. Define ATM sub-interface. Commands (config)# int atm0 (config)# int atm0.1 point-to-point (config-subif)# ip address (config-subif)# mpls ip (config-subif)# pvc 2/100 (config-if-atm-vc# encapsulation aal5snap (config-if-atm-vc# exit NetworkSims.com Prof W.Buchanan 3

4 (config)# router ospf 101 (config-router)# network area 1 Example (config)# int atm0 (config)# int atm0.1? mpls Treat as an MPLS link multipoint Treat as a multipoint link point-to-point Treat as a point-to-point link tag-switching Treat as a tag switching link (obsolete, use mpls) <cr> (config)# int atm0.1 point-to-point (config-subif)# ip address (config-subif)# mpls? atm Tag controlled ATM parameters ip Configure dynamic MPLS forwarding for IP label Label properties ldp Configure Label Distribution Protocol (LDP) parameters mtu Set tag switching Maximum Transmission Unit netflow Configure Egress Netflow Accounting traffic-eng Configure Traffic Engineering parameters (config-subif)# mpls ip (config-subif)# pvc? <0-7> Enter VPI/VCI value(slash required) <1-1023> Enter VCI value WORD Optional handle to refer to this connection (config-subif)# pvc 2/100 (config-if-atm-vc)# encapsulation? aal5ciscoppp Cisco PPP over AAL5 Encapsulation aal5mux AAL5+MUX Encapsulation aal5nlpid AAL5+NLPID Encapsulation aal5snap AAL5+LLC/SNAP Encapsulation (config-if-atm-vc# encapsulation aal5snap (config)# router ospf 101 (config-router)# network area 1 Cisco MPLS MPLS Basics The most up-to-date version of this test is at: NetworkSims.com Prof W.Buchanan 4

5 Cisco Router Challenge 229 Outline This challenge involves an MPLS VPN configuration, whihc is often seen in ISP applications, and uses MPLS forwarding and VRF (Virtual Routing and Forwarding). VRF is used to create multiple instances of a routing table within the same router, at the same time. Thus the same, or overlapping, IP addresses can be used without a conflict, as all of these routing instances are independent. VRF uses Forwarding Information Bases (FIBs), which are distinct routing tables. With an MPLS domain, the Provider Edge (PE) routing switch is the only device to have knowledge of the multiple different virtual routing engines, and Customer Edge (CE) devices then participate in their MPLS VPN routing via route dissemination (RD) to and from the PE, using a routing engine such as ebgp, OSPF or static routing. All the other Provider (P) switches in backbone do not have any knowledge of IP routing within this context. The PE traffic travels over the core network using label switching. This challenge involves the configuration of the VRF on the PE routers, and the next challenge sets up BGP PE-PE Routing on PE Routers, which is required to transport the routes over the backbone. Objectives The objectives of this challenge are to: Configure VRF. Configure RD (which is used to make a unique IP address). Configure import and export policy (RT). Associate VRF with an interface Commands (config)# ip vrf Testing (config-vrf)# rd 1:100 (config-vrf)# route-target both 1:100 Example NetworkSims.com Prof W.Buchanan 5

6 (config)# ip vrf? WORD VPN Routing/Forwarding instance name (config)# ip vrf Testing (config-vrf)#? IP VPN Routing/Forwarding instance configuration commands: bgp Commands pertaining to BGP context Associate SNMP context with this vrf default Set a command to its defaults description VRF specific description exit Exit from VRF configuration mode maximum Set a limit mdt Backbone Multicast Distribution Tree no Negate a command or set its defaults rd Specify Route Distinguisher route-target Specify Target VPN Extended Communities vpn Configure VPN ID as specified in rfc2685 (config-vrf)# rd 1:100 (config-vrf)# rd? ASN:nn or IP-address:nn VPN Route Distinguisher (config-vrf)# route-target? ASN:nn or IP-address:nn Target VPN Extended Community both Both import and export Target-VPN community export Export Target-VPN community import Import Target-VPN community (config-vrf)# route-target both? ASN:nn or IP-address:nn Target VPN Extended Community (config-vrf)# route-target both 1:100 (config-if)# ip vrf? forwarding Configure forwarding table receive Add Interface Address into VRF Table sitemap Configure route-map for routes received from this site (config-if)# ip vrf forwarding? WORD Table name The RD value creates routing and forwarding tables. It is added at the beginning of customer IP addresses, to convert them to unique IP address. It can either be: 16-bit AS number: 32-bit number. For example 1:100, which has an AS of 1, and a 32-bit number of bit IP number: 16-bit number. For example :1, which has a 16-bit value of 1. The VRF is associated with an interface with: NetworkSims.com Prof W.Buchanan 6

7 Cisco Router Challenge 230 Outline The previous challenge involved the configuration of the VRF on the PE routers, and this next challenge sets up BGP PE-PE Routing on PE Routers, which is required to transport the routes over the backbone. Objectives The objectives of this challenge are to: Configure VRF. Configure RD (which is used to make a unique IP address). Configure import and export policy (RT). Associate VRF with an interface. Configure BGP PE-PE on a PE device. Commands (config)# ip vrf Testing (config-vrf)# rd 1:100 (config-vrf)# route-target both 1:100 (config)# router bgp 1 (config-router)# neighbor remote-as 1 (config-router)# neighbor update-source loopback5 (config-router)# address-family vpn4 (config-router-af)# neighbor send-community extended (config-router-af)# neighbor activate Example NetworkSims.com Prof W.Buchanan 7

8 (config)# ip vrf? WORD VPN Routing/Forwarding instance name (config)# ip vrf Testing (config-vrf)#? IP VPN Routing/Forwarding instance configuration commands: bgp Commands pertaining to BGP context Associate SNMP context with this vrf default Set a command to its defaults description VRF specific description exit Exit from VRF configuration mode maximum Set a limit mdt Backbone Multicast Distribution Tree no Negate a command or set its defaults rd Specify Route Distinguisher route-target Specify Target VPN Extended Communities vpn Configure VPN ID as specified in rfc2685 (config-vrf)# rd 1:100 (config-vrf)# rd? ASN:nn or IP-address:nn VPN Route Distinguisher (config-vrf)# route-target? ASN:nn or IP-address:nn Target VPN Extended Community both Both import and export Target-VPN community export Export Target-VPN community import Import Target-VPN community (config-vrf)# route-target both? ASN:nn or IP-address:nn Target VPN Extended Community (config-vrf)# route-target both 1:100 (config-if)# ip vrf? forwarding Configure forwarding table receive Add Interface Address into VRF Table sitemap Configure route-map for routes received from this site (config-if)# ip vrf forwarding? WORD Table name (config)# router bgp 1 (config-router)# neighbor remote-as 1 (config-router)# neighbor update-source loopback5 (config-router)# address-family vpn4 (config-router-af)#? Router Address Family configuration commands: auto-summary Enable automatic network number summarization autonomous-system Specify AS number for Address Family default Set a command to its defaults default-information Control distribution of default information default-metric Set metric of redistributed routes distance Define an administrative distance distribute-list Filter networks in routing updates eigrp EIGRP specific commands exit-address-family Exit from Address Family configuration mode help Description of the interactive help system maximum-paths Forward packets over multiple paths metric Modify EIGRP routing metrics and parameters network Enable routing on an IP network no Negate a command or set its defaults NetworkSims.com Prof W.Buchanan 8

9 offset-list Add or subtract offset from RIP metrics redistribute Redistribute information from another routing protocol variance Control load balancing variance (config-router-af)# neighbor? A.B.C.D Neighbor address WORD Neighbor tag X:X:X:X::X Neighbor IPv6 address (config-router-af)# neighbor ? activate Enable the Address Family for this Neighbor advertise-map specify route-map for conditional advertisement advertisement-interval Minimum interval between sending BGP routing updates allowas-in Accept as-path with my AS present in it description Neighbor specific description distribute-list Filter updates to/from this neighbor dmzlink-bw Propagate the DMZ link bandwidth ebgp-multihop Allow EBGP neighbors not on directly connected networks filter-list Establish BGP filters local-as Specify a local-as number maximum-prefix Maximum number of prefix accept from this peer next-hop-self Disable the next hop calculation for this neighbor password Set a password peer-group Member of the peer-group prefix-list Filter updates to/from this neighbor remote-as Specify a BGP neighbor remove-private-as Remove private AS number from outbound updates route-map Apply route map to neighbor route-reflector-client Configure a neighbor as Route Reflector client send-community Send Community attribute to this neighbor shutdown Administratively shut down this neighbor soft-reconfiguration Per neighbor soft reconfiguration timers BGP per neighbor timers unsuppress-map Route-map to selectively unsuppress suppressed routes update-source Source of routing updates version Set the BGP version to match a neighbor weight Set default weight for routes from this neighbor (config-router-af)# neighbor send? both Send Standard and Extended Community attributes extended Send Extended Community attribute standard Send Standard Community attribute <cr> (config-router-af)# neighbor send-community extended (config-router-af)# neighbor activate NetworkSims.com Prof W.Buchanan 9